EP0420259A2 - ProcÀ©dé et appareil pour l'enregistrement d'images en couleurs - Google Patents

ProcÀ©dé et appareil pour l'enregistrement d'images en couleurs Download PDF

Info

Publication number
EP0420259A2
EP0420259A2 EP90118618A EP90118618A EP0420259A2 EP 0420259 A2 EP0420259 A2 EP 0420259A2 EP 90118618 A EP90118618 A EP 90118618A EP 90118618 A EP90118618 A EP 90118618A EP 0420259 A2 EP0420259 A2 EP 0420259A2
Authority
EP
European Patent Office
Prior art keywords
recording
color
image
uniformity
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP90118618A
Other languages
German (de)
English (en)
Other versions
EP0420259A3 (en
Inventor
Akio C/O Canon Kabushiki Kaisha Suzuki
Hisashi C/O Canon Kabushiki Kaisha Fukushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0420259A2 publication Critical patent/EP0420259A2/fr
Publication of EP0420259A3 publication Critical patent/EP0420259A3/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/603—Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer
    • H04N1/6033—Colour correction or control controlled by characteristics of the picture signal generator or the picture reproducer using test pattern analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
    • H04N1/4015—Compensating positionally unequal response of the pick-up or reproducing head of the reproducing head

Definitions

  • the present invention relates to a color image recording method and apparatus, more particularly to such a method and apparatus for forming a color image using plural recording heads.
  • an image is read and is converted to image data which are in turn converted to digital signals.
  • the digital signals are processed, and an image is recorded by recording heads using the processed data.
  • the densities of the record is not necessarily uniform among recording elements due to recording property variations attributable to the recording head manufacturing process and attributable to the recording head constituting materials. This non-uniformity results in the density non-uniformity of the recorded image.
  • a test run is effected before the recording operation to inspect the output properties for the respective recording elements, and the output properties are stored as data.
  • the input image data is corrected so as to compensate the above described density non-uniformity.
  • U.S. Serial Nos. 271,299 and 480,041 assigned to the assignee of this application for example, proposes methods of the correction.
  • the non-uniformity may be very conspicuous when a color image is formed using two different color heads.
  • the ordinate represents a density
  • abscissa represents positions of the heads constituting a multi-head. Even if the density non-uniformity of each of the head is so small as to be not conspicuous, the density non-uniformity is strengthened to be very conspicuous, when the patterns of the respective color image components have the same phase, as shown in Figure 3, which are superposed to each other.
  • the magenta component is stronger in a portion A, and the cyan component is stronger in a portion B.
  • the color non-uniformity is produced and is very conspicuous.
  • the density non-uniformity may be strengthened depending on the non-uniformity patterns of the respective heads, with the result of non-­uniformity in the color. It is possible that the resultant non-uniformity is not expected from the non-­uniformity pattern in a single color recording.
  • a color image recording apparatus comprising recording means including plural recording heads for different colors to record a color image, detecting means for forming a mixed color image using at least two recording heads, and for detecting a density non-uniformity of the image, and control means for controlling said recording means in accordance with an output of the detecting means.
  • references 21a, 21b and 21c designate image signals for cyan color, magenta color and yellow color, respectively.
  • the apparatus comprises correction tables 22a, 22b and 22c for the respective colors.
  • the apparatus comprises a binary coding circuit 31a, 31b and 31c, ink jet recording heads 24a, 24b and 24c each having 256 nozzles and a reader 25 provided with red (R), green (G) and blue (B) filters.
  • the signals produced by the reader 25 are indicated by references 26a, 26b and 26c, which are read through R, G and B filters, respectively.
  • the apparatus further comprises a RAM 32 for temporarily storing the R, G and B signals, a CPU for processing correction data on the basis of the R, G and B signals.
  • the correction data for the cyan, magenta and yellow colors produced by the CPU 27 are indicated by references 28a, 28b and 28c.
  • the apparatus comprises color correction RAM 29a, 29b and 29c for the respective colors.
  • the non-uniformity correction signals for the respective colors are depicted by references 30a, 30b and 30c.
  • the input image signals 21a, 21b and 21c are processed by the non-uniformity correcting tables 22a, 22b and 22c so as to compensate the non-uniformities peculiar to the respective recording head 24a, 24b and 24c.
  • a correcting line is selected on the basis of non-uniformity correcting signals 30a, 30b and 30c.
  • the correcting line with small inclination is selected, whereas when it is the nozzle having the property of small dot diameter, a large inclination correcting line is selected, by which the image signal is corrected.
  • the non-uniformity correction tables 22a, 22b and 22c store selection signals for the correction lines required for correcting the non-uniformities of the respective recording heads. More particularly, the correcting signals from the 61 lines are stored for 256 nozzles (the recording heads 24a, 24b and 24c have 256 nozzles), in this embodiment. In response to input signals, non-uniformity correcting signals 30a, 30b and 30c are produced. After the correction on the basis of the selected lines, the corrected image signals 23a, 23b and 23c are converted to binary signals using the binary coding circuits 31a, 31b and 31c using dither process, an error dispersing process or the like. The multi-nozzle ink jet recording heads 24a, 24b and 24c are driven by the binary signals thus provided. In this manner, the uniform images can be provided.
  • a line of inclination 1.0 is selected in each of the non-uniformity correcting tables 22a, 22b and 22c, that is, the non-correcting operation mode is established (step 41, Figure 7).
  • a correction pattern is provided from an unshown signal source, and a correction pattern is printed or recorded by the recording heads 24a, 24b and 24c (step 42).
  • the correcting pattern any type or any number of types are usable, and one skilled in the art can determine properly in accordance with the spirit of the present invention.
  • a uniform pattern in six colors is used wherein the pattern is made of cyan color, magenta color, yellow color (single colors), a red color, a green color and a blue color (mixed two colors).
  • the output pattern is read by the reader 25 ( Figure 1) the read signals 26a, 26b and 26c for three colors read by the reader 25 are once stored in the RAM 32 (step 43).
  • the CCD of the reader 25 has the reading density which is the density of the record of the recording heads. In this embodiment, it is 400 dpi. In this embodiment, the number of picture element of the CCD is larger than the number of the nozzles 256 of the recording head. Therefore, by the reading operation, three color separated signals of the non-­uniformity pattern of the six color pattern is determined.
  • Figure 6 is the three-color-separated signals provided in this manner.
  • the picture element printed by the first nozzle is read, and an R-reading output is Rc1, G-reading output is Gcl, B-reading output is Bc1.
  • Rc1 - Rc256, Gc1 - Gc256, Bc1 - Bc256 are obtained.
  • the magenta pattern is read, Rm1 - Rm246, Gm1 - Gm256, Bm1 - Bm256 are obtained.
  • Ry1 - Ry256, Gy1 - Gy256, By1 - By256 are obtained.
  • Rr1 - Rr256, Gr1 - Gr256, Br1 - Br256 are obtained.
  • Rg1 - Rg256, Gg1 - Gg256, Bg1 - Bg256 are obtained.
  • Rb1 - Rb256, Gb1 - Gb256 and Bb1 - Bb256 are obtained.
  • the characteristics of the R, G, B filters of the reader are known.
  • the CPU 27 executes process on the basis of the known characteristics of the filters and the signals Rc1, Gc1 and Bc1 stored in the RAM 32 to determine a chromaticity L*abc1 when the first nozzle of the recording head prints, the cyan pattern (L represents lightness, and ab represents the chromaticity).
  • the chromaticity L*abm1 when the first nozzle prints the magenta pattern is obtained from the signals Rm1, Gm1 and Bm1;
  • L*aby1 is obtained from the signals Ry1, Gy1 and By1.
  • ROM 101 in the CPU 27 stores the ideal chromaticities of the six color output pattern, they are L*abc0, L*abm0, L*aby0, L*abr0, L*abg0 and L*abb0.
  • the color difference between the measured chromaticity of the test patterns and the ideal chromaticities are determined for the magenta color, yellow color, red color, green color and blue color. They are ⁇ E*abm1, ⁇ E*aby1, ⁇ E*abr1, ⁇ E*abg1, E*abb1 (step 45).
  • the change of L*ab when C, M and Y signals are slightly changed are empirically determined in the respective patches of the chromaticities, and resultants are stored in the form of polynomials or LUT.
  • L*ab when the C, M and Y signals are changed by small amounts are calculated, and the basis of the calculated values, ⁇ E*ab1 is calculated.
  • the correction amounts for the C, M and Y signals providing minimum ⁇ E*ab1 are determined.
  • selection signals for the correction line in the non-uniformity correcting table is determined in accordance with the correction amount (step 48).
  • the above described processing is executed for the first nozzle ... 256th nozzle (step 49).
  • the selection signals for the correcting tables are determined for the respective nozzles. They are stored in the non-uniformity correcting RAM 29a, 29b and 29c in Figure 1 (step 50).
  • the signals for the respective colors are corrected in the correction data described above, by which the chromaticity of each nozzle is corrected to be the ideal level, and therefore, the non-uniformity can be corrected when the colors are mixed.
  • the correction is made as an average for plural patterns, and therefore, the non-uniformity is not unexpectedly conspicuous in a particular color mixture pattern.
  • the outputting and reading of the non-uniformity correcting pattern may be carried out by a service man or a user, or it is possible that the apparatus automatically carries out it.
  • the original reader may be used as the reader described in the foregoing.
  • the number of dots by each nozzle is corrected.
  • the width of the driving pulse applied to each nozzle is corrected.
  • Figure 2 shows a block diagram therefor, wherein the same reference numerals are assigned to the corresponding parts.
  • the corrected signals 23a, 23b and 23c are supplied to the driving circuits 51a, 51b and 51c.
  • the driving circuits 51a, 51b and 51c produces driving pulse signals 52a, 52b and 52c having the pulse widths in accordance with the magnitudes of the signals 23a, 23b and 23c.
  • the multi-nozzle recording head 24a, 24b and 24c are driven.
  • the multi-nozzle heads are of piezoelectric type, in which the quantity of the ink ejected is changeable in accordance with the driving pulse width. Therefore, the non-uniformity can be corrected with the above-described structure.
  • a third embodiment of the present invention will be described, wherein a voltage of the pulse applied to each of the nozzles is corrected.
  • the driving circuits 51a, 51b and 51c control the driving voltages applied to the recording head 24a, 24b and 24c.
  • the driving pulses 52a, 52b and 52c are controlled in the voltages in accordance with the signals 23a, 23b and 23c, and the control signals are produced.
  • the plural recording heads 24a, 24b and 24c are capable of controlling the quantity of ejected ink in accordance with the driving voltage, and therefore, the non-uniformity can be corrected in the structure described above.
  • the chromaticity is determined by L*ab is used, but this is not limiting, and another chromaticity coordinate system, such as L*uv or the like is usable.
  • the type of the multi-head may be a full-line head having the length equal to the image recording width, or a semi-multi-­head wherein serial scan is used.
  • the recording head is not limited to the ink jet recording head, but it may be a thermal recording type head such as thermal transfer type.
  • thermal recording type head such as thermal transfer type.
  • ink jet recording head it is not limited to the piezoelectric type, but may be another type in which a bubble is produced by a heater in a nozzle to eject the ink from the nozzle.
  • the correction (test) pattern is not limitedly in six colors, but a desired colors and a desired number of patterns are usable.
  • the E*ab1 which is to be minimized is not limited to the mean square root of the color difference in each of the test patterns, but may be a simple average or a weight average with giving weights to the respective test patterns.
  • a size of the dot or the density thereof for each picture element is corrected so that when a uniform pattern is printed, the chromaticities of the respective picture elements are substantially the same. Then, the image without non-uniformity can be provided even if the colors are mixed.
  • the correction is made such that the effects of the correction are on the average of different color uniform patterns, and therefore, the non-uniformities for the respective colors are small on the average.
  • the test pattern is in the colors including red, green and blue (mixed color) and yellow, magenta and cyan colors (single color pattern), and therefore, the density non-uniformity can be minimized for the full-color image.
  • the color mixture may be between the similar colors, for example, dark and light similar color ink may be mixed.
  • the non-uniformity can be corrected with high accuracy.
  • a color image recording apparatus includes a recording device having plural recording elements corresponding to different colors to form a color image; a detector for causing the recording device to form a color mixed image and for detecting density non-uniformity of the image; and a device for controlling the recording device in accordance with an output of the detecting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Ink Jet (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP19900118618 1989-09-28 1990-09-27 Color image recording method and apparatus Ceased EP0420259A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP254329/89 1989-09-28
JP1254329A JP2840323B2 (ja) 1989-09-28 1989-09-28 カラー画像記録装置

Publications (2)

Publication Number Publication Date
EP0420259A2 true EP0420259A2 (fr) 1991-04-03
EP0420259A3 EP0420259A3 (en) 1992-05-06

Family

ID=17263491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900118618 Ceased EP0420259A3 (en) 1989-09-28 1990-09-27 Color image recording method and apparatus

Country Status (3)

Country Link
US (1) US6126264A (fr)
EP (1) EP0420259A3 (fr)
JP (1) JP2840323B2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0933223A1 (fr) * 1997-07-04 1999-08-04 Seiko Epson Corporation Procede et dispositif de correction de donnees imprimees, et support d'enregistrement de logiciel sur lequel est enregistre un programme de correction de donnees imprimees
EP0942589A2 (fr) * 1998-03-12 1999-09-15 Eastman Kodak Company Procédé pour caractériser une fonction de réponse d'un dispositif de sortie
EP0869663A3 (fr) * 1997-04-02 2000-07-19 Seiko Epson Corporation Dispositif et procédé de correction de couleurs; dispositifs de traitement et d'impression d'images en couleurs
CN102514394B (zh) * 2007-04-10 2015-02-18 佳能株式会社 打印设备和获取输送误差校正值的方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6000776A (en) * 1990-05-11 1999-12-14 Canon Kabushiki Kaisha Apparatus and method for regulating image density
US5353052A (en) * 1990-05-11 1994-10-04 Canon Kabushiki Kaisha Apparatus for producing unevenness correction data
US6196736B1 (en) * 1998-08-18 2001-03-06 Seiko Epson Corporation Adjustment of printing position deviation during bidirectional printing
JP2000307865A (ja) * 1999-04-19 2000-11-02 Canon Inc 情報処理装置、記録装置、情報処理方法、および記録方法
JP4428752B2 (ja) * 1999-04-19 2010-03-10 キヤノン株式会社 記録装置
JP2000301810A (ja) * 1999-04-19 2000-10-31 Canon Inc テストパターン記録方法、情報処理装置および記録装置
US6842188B2 (en) * 2003-05-16 2005-01-11 Eastman Kodak Company Method for setting focus of a multichannel printhead
US7259857B2 (en) * 2004-01-14 2007-08-21 Xerox Corporation Methods for automated uniformity assessment and modification of image non-uniformities
US8985733B2 (en) * 2013-03-29 2015-03-24 Brother Kogyo Kabushiki Kaisha Pattern inspection apparatus, pattern inspection method, and printer
JP6372410B2 (ja) * 2015-03-31 2018-08-15 ブラザー工業株式会社 データ補正方法、補正関数取得方法、及び、インクジェットプリンタ。

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011722A2 (fr) * 1978-11-29 1980-06-11 International Business Machines Corporation Procédé et dispositif de réglage digital pour obtenir des reproductions en couleurs
JPS63303370A (ja) * 1987-06-03 1988-12-09 Konica Corp カラ−画像形成装置
JPH01110154A (ja) * 1987-10-23 1989-04-26 Matsushita Electric Ind Co Ltd 色修正方法
US4829323A (en) * 1986-08-25 1989-05-09 Canon Kabushiki Kaisha Color image recording apparatus
EP0317268A2 (fr) * 1987-11-16 1989-05-24 Canon Kabushiki Kaisha Appareil d'enregistrement d'images

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1166889B (it) * 1979-06-14 1987-05-06 Contraves Italiana Spa Disposizione d'antenne integrate per apparecchiature radar che permette la contemporanea generazione di due o piu' diagrammi d'irradiazione uno diverso dall'altro
US4403874A (en) * 1980-03-25 1983-09-13 Ramtek Corporation Color printer and multi-ribbon cartridge therefor
JPS5741967A (en) * 1980-08-26 1982-03-09 Canon Inc Color ink jet recording device
US4468112A (en) * 1981-02-18 1984-08-28 Canon Kabushiki Kaisha Developer concentration controlling device
JPS57159661A (en) * 1981-03-30 1982-10-01 Canon Inc Dot diameter controlling system
JPS58143356A (ja) * 1982-02-19 1983-08-25 Canon Inc 光プリンタ
US4675696A (en) * 1982-04-07 1987-06-23 Canon Kabushiki Kaisha Recording apparatus
JPS5968245A (ja) * 1982-10-13 1984-04-18 Ricoh Co Ltd 多色インクジエツト記録方法
US4682216A (en) * 1983-03-08 1987-07-21 Canon Kabushiki Kaisha Color image picture forming process and apparatus which improves the quality of the black portions of the picture
FR2587572B1 (fr) * 1985-03-20 1994-02-18 Canon Kk Appareil et procede de traitement d'images
US4630069A (en) * 1985-05-24 1986-12-16 Polaroid Corporation Color thermal transfer recording system and ribbon
US4853768A (en) * 1985-12-26 1989-08-01 Canon Kabushiki Kaisha Color image processing apparatus with linear masking circuit having coefficients which vary in accordance with the levels of color component signals
EP0259981B2 (fr) * 1986-08-13 1999-05-06 Canon Kabushiki Kaisha Procédé et appareil pour le traitement des images en couleurs
JPH0738685B2 (ja) * 1986-11-10 1995-04-26 キヤノン株式会社 カラ−画像記録装置
US4929978A (en) * 1987-10-23 1990-05-29 Matsushita Electric Industrial Co., Ltd. Color correction method for color copier utilizing correction table derived from printed color samples
US4985759A (en) * 1988-04-05 1991-01-15 Ricoh Company, Ltd. Method and apparatus for extracting black color component
US5004928A (en) * 1988-04-18 1991-04-02 Canon Kabushiki Kaisha Printing method in which both sides of the recording sheet are inspected and apparatus therefor
US4827279A (en) * 1988-06-16 1989-05-02 Eastman Kodak Company Process for correcting across-the-head nonuniformity in thermal printers
JP2950950B2 (ja) * 1990-08-31 1999-09-20 キヤノン株式会社 画像記録装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011722A2 (fr) * 1978-11-29 1980-06-11 International Business Machines Corporation Procédé et dispositif de réglage digital pour obtenir des reproductions en couleurs
US4829323A (en) * 1986-08-25 1989-05-09 Canon Kabushiki Kaisha Color image recording apparatus
JPS63303370A (ja) * 1987-06-03 1988-12-09 Konica Corp カラ−画像形成装置
JPH01110154A (ja) * 1987-10-23 1989-04-26 Matsushita Electric Ind Co Ltd 色修正方法
EP0317268A2 (fr) * 1987-11-16 1989-05-24 Canon Kabushiki Kaisha Appareil d'enregistrement d'images

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 135 (P-851)5 April 1989; & JP-A-63 303 370 ( KONICA CORPORATION ) 9 December 1988 *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 327 (M-854)24 July 1989; & JP-A-01 110 154 ( MATSUSHITA ELECTRIC IND CO LTD ) 26 April 1989 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0869663A3 (fr) * 1997-04-02 2000-07-19 Seiko Epson Corporation Dispositif et procédé de correction de couleurs; dispositifs de traitement et d'impression d'images en couleurs
US6404509B1 (en) 1997-04-02 2002-06-11 Seiko Epson Corporation Color correction device
EP1439692A2 (fr) * 1997-04-02 2004-07-21 Seiko Epson Corporation Appareil de traitement d'images pour appareil d'impression d'image couleur
EP1439692A3 (fr) * 1997-04-02 2005-04-27 Seiko Epson Corporation Appareil de traitement d'images pour appareil d'impression d'image couleur
US7019867B2 (en) 1997-04-02 2006-03-28 Seiko Epson Corporation Color correction device
EP0933223A1 (fr) * 1997-07-04 1999-08-04 Seiko Epson Corporation Procede et dispositif de correction de donnees imprimees, et support d'enregistrement de logiciel sur lequel est enregistre un programme de correction de donnees imprimees
EP0933223A4 (fr) * 1997-07-04 2003-03-12 Seiko Epson Corp Procede et dispositif de correction de donnees imprimees, et support d'enregistrement de logiciel sur lequel est enregistre un programme de correction de donnees imprimees
US6954289B2 (en) 1997-07-04 2005-10-11 Seiko Epson Corporation Print data adjusting system, print data adjusting method, and software storage medium containing print data adjusting program
EP0942589A2 (fr) * 1998-03-12 1999-09-15 Eastman Kodak Company Procédé pour caractériser une fonction de réponse d'un dispositif de sortie
EP0942589A3 (fr) * 1998-03-12 1999-12-15 Eastman Kodak Company Procédé pour caractériser une fonction de réponse d'un dispositif de sortie
CN102514394B (zh) * 2007-04-10 2015-02-18 佳能株式会社 打印设备和获取输送误差校正值的方法

Also Published As

Publication number Publication date
JPH03114761A (ja) 1991-05-15
JP2840323B2 (ja) 1998-12-24
EP0420259A3 (en) 1992-05-06
US6126264A (en) 2000-10-03

Similar Documents

Publication Publication Date Title
US5343231A (en) Image recording apparatus capable of correcting density unevenness
US5285220A (en) Image recording apparatus with tone correction for individual recording heads
EP0388978B1 (fr) Cartouche d'une tête d'enregistrement et appareil d'enregistrement utilisant ladite cartouche
US8427697B2 (en) Color separation into plural ink components including primary color ink and spot color ink
EP0401023B1 (fr) Système d'enregistrement d'images et appareil pour celui-ci
EP0420259A2 (fr) ProcÀ©dé et appareil pour l'enregistrement d'images en couleurs
US6659583B2 (en) Printing involving halftone reproduction with different density inks in pixel block units
JP5072349B2 (ja) 画像形成装置およびその制御方法
US7436543B2 (en) Color separation based on ink characteristics
JP4371640B2 (ja) カラー出力方法及び出力装置
JP3666427B2 (ja) 画像処理装置、印刷制御装置、画像処理方法、および記録媒体
JPH09327936A (ja) プリンタ装置およびプリンタヘッド
JP3040407B2 (ja) 画像記録装置
KR100927917B1 (ko) 화상 형성 장치, 화상 형성 방법 및 기록 매체
US20050185011A1 (en) Ejection control of quality-enhancing ink
JP4300742B2 (ja) 画像データの階調数を変換する画像処理装置
JP3611179B2 (ja) 印刷制御方法、印刷制御装置および印刷制御プログラムを記録した媒体
JPH11115222A (ja) 複数種類の階調再現サブモードを用いたドット記録方法および装置、並びに、その処理を実行するためのプログラムを記録した記録媒体
JP4501647B2 (ja) 誤差情報取得方法、誤差情報取得プログラム、誤差情報取得装置、印刷制御方法、印刷制御プログラム及び印刷制御装置
EP0430075B1 (fr) Dispositif d'enregistrement d'images avec tête d'enregistrement
JP2001158116A (ja) 印刷装置の調整方法、調整方法を記録した記録媒体、および印刷装置
KR19990007426A (ko) 프린터장치. 프린터시스템 및 프린터장치의 구동방법
JP2007055013A (ja) 色補正装置、色補正方法および色補正プログラム
EP0790130B1 (fr) Appareil d'impression et méthode pour supprimer l'émission d'un excès de liquide de dilution
JP2004284075A (ja) インクジェット記録装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900927

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19940311

APAB Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPE

APAD Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOS REFNE

APAB Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20000711

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE